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Code Issues Releases Wiki Activity

added mask method

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Oliver Vogel
2013-03-18 14:34:12 +01:00
parent 5b6ecf0461
commit 4f89fa304e
5 changed files with 114 additions and 0 deletions
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4
README.md
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@@ -54,6 +54,7 @@ Add the facade of this package to the `$aliases` array.
* Image::crop - Crop the current image
* Image::grab - Cut out a detail of the image in given ratio and resize to output size
* Image::resizeCanvas - Resize image boundaries
* Image::mask - Apply given image as alpha mask on current image
* Image::insert - Insert another image on top of the current image
* Image::brightness - Changes brightness of current image (-100 = min brightness, 0 = no change, +100 = max brightness)
* Image::contrast - Changes contrast of current image (-100 = min contrast, 0 = no change, +100 = max contrast)
@@ -217,6 +218,9 @@ $img->circle('ae051f', 400, 300, 100, false);
// draw a red line from point 10,10 to point 300,300 pixel
$img->line('ae051f', 10, 10, 300, 300);
// Apply image as alpha mask on image
$img->mask('public/mask.png', true);
// rotate image 90° clockwise
$img->rotate(90);

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50
src/Intervention/Image/Image.php
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@@ -678,6 +678,56 @@ class Image
return $this;
}
/**
* Apply given image as alpha mask on current image
*
* @param mixed $file
* @return Image
*/
public function mask($file, $mask_with_alpha = false)
{
// create new empty image
$maskedImage = new Image(null, $this->width, $this->height);
// create mask
$mask = is_a($file, 'Intervention\Image\Image') ? $file : (new Image($file));
// resize mask to size of current image (if necessary)
if ($mask->width != $this->width || $mask->height != $this->height) {
$mask->resize($this->width, $this->height);
}
// redraw old image pixel by pixel considering alpha map
for ($x=0; $x < $this->width; $x++) {
for ($y=0; $y < $this->height; $y++) {
$color = $this->pickColor($x, $y, 'array');
$alpha = $mask->pickColor($x, $y, 'array');
if ($mask_with_alpha) {
$alpha = $alpha['alpha']; // use alpha channel as mask
} else {
$alpha = 127 - floor($alpha['red'] / 2); // use red channel as mask
}
// preserve alpha of original image...
if ($color['alpha'] > $alpha) {
$alpha = $color['alpha'];
}
$pixelColor = $this->parseColor(array($color['red'], $color['green'], $color['blue'], $alpha));
$maskedImage->pixel($pixelColor, $x, $y);
}
}
// apply masked image to current instance
$this->resource = $maskedImage->resource;
$this->width = $maskedImage->width;
$this->height = $maskedImage->height;
return $this;
}
/**
* Rotate image with given angle
*

60
tests/ImageTest.php
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@@ -433,7 +433,67 @@ class ImageTest extends PHPUnit_Framework_Testcase
$img = $this->getTestImage();
$img->insert('public/test.jpg', 10, 10);
$this->assertInstanceOf('Intervention\Image\Image', $img);
}
public function testMaskImage()
{
// simple image mask
$img = Image::make('public/test.jpg');
$img->resize(32, 32)->mask('public/mask1.png', false);
$this->assertInstanceOf('Intervention\Image\Image', $img);
$this->assertInternalType('int', $img->width);
$this->assertInternalType('int', $img->height);
$this->assertEquals($img->width, 32);
$this->assertEquals($img->height, 32);
$checkColor = $img->pickColor(16, 2, 'array');
$this->assertEquals($checkColor['red'], 254);
$this->assertEquals($checkColor['green'], 230);
$this->assertEquals($checkColor['blue'], 186);
$this->assertEquals($checkColor['alpha'], 22);
$checkColor = $img->pickColor(31, 31, 'array');
$this->assertEquals($checkColor['red'], 0);
$this->assertEquals($checkColor['green'], 0);
$this->assertEquals($checkColor['blue'], 0);
$this->assertEquals($checkColor['alpha'], 127);
// use alpha channel as mask
$img = Image::make('public/test.jpg');
$img->resize(32, 32)->mask('public/mask2.png', true);
$this->assertInstanceOf('Intervention\Image\Image', $img);
$this->assertInternalType('int', $img->width);
$this->assertInternalType('int', $img->height);
$this->assertEquals($img->width, 32);
$this->assertEquals($img->height, 32);
$checkColor = $img->pickColor(5, 5, 'array');
$this->assertEquals($checkColor['red'], 0);
$this->assertEquals($checkColor['green'], 0);
$this->assertEquals($checkColor['blue'], 0);
$this->assertEquals($checkColor['alpha'], 127);
$checkColor = $img->pickColor(20, 15, 'array');
$this->assertEquals($checkColor['red'], 254);
$this->assertEquals($checkColor['green'], 190);
$this->assertEquals($checkColor['blue'], 69);
$this->assertEquals($checkColor['alpha'], 0);
// preserve existing alpha channel
$img = Image::make('public/circle.png');
$img->resize(32, 32)->mask('public/mask2.png', true);
$this->assertInstanceOf('Intervention\Image\Image', $img);
$this->assertInternalType('int', $img->width);
$this->assertInternalType('int', $img->height);
$this->assertEquals($img->width, 32);
$this->assertEquals($img->height, 32);
$checkColor = $img->pickColor(5, 5, 'array');
$this->assertEquals($checkColor['red'], 0);
$this->assertEquals($checkColor['green'], 0);
$this->assertEquals($checkColor['blue'], 0);
$this->assertEquals($checkColor['alpha'], 127);
$checkColor = $img->pickColor(15, 15, 'array');
$this->assertEquals($checkColor['red'], 0);
$this->assertEquals($checkColor['green'], 0);
$this->assertEquals($checkColor['blue'], 0);
$this->assertEquals($checkColor['alpha'], 25);
}
public function testPixelateImage()